Move font property inside of font item to store together with font

src/libslic3r/Emboss.hpp

@@ -46,13 +46,15 @@ public:
     struct Glyph
     {
         ExPolygons shape;
-        int advance_width, left_side_bearing;
+        int advance_width=0, left_side_bearing=0;
     };
     // cache for glyph by unicode
     using Glyphs = std::map<int, Glyph>;
         
     /// <summary>
     /// keep information from file about font
+    /// + cache shape of glyphs (optionaly modified)
+    /// + user defined modification of font
     /// </summary>
     struct Font
     {
@@ -65,6 +67,10 @@ public:
         // vertical position is "scale*(ascent - descent + lineGap)"
         const int ascent, descent, linegap;
 
+        // user defined font modification
+        // + emboss parameter
+        FontProp prop;
+
         Emboss::Glyphs cache; // cache of glyphs
 
         Font(std::vector<unsigned char> &&buffer,
@@ -78,9 +84,21 @@ public:
             , ascent(ascent)
             , descent(descent)
             , linegap(linegap)
+            , prop(7.f, 1.f)
         {}
     };
 
+
+    struct UserFont
+    {
+        // description of file
+        Font     file_font;
+        // user defined font modification
+        FontProp prop;
+        // cache of glyphs
+        Emboss::Glyphs cache; 
+    };
+
     /// <summary>
     /// Load font file into buffer
     /// </summary>